package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import io.swagger.models.auth.In;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
public class ReportServiceImpl implements ReportService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WorkspaceService workspaceService;
    @Override
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {
//        存放begin到end的日期
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }

        List<Double> turnoverList = new ArrayList<>();
        for (LocalDate date : dateList){
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            Double turnover=orderMapper.sumMap(beginTime, endTime, Orders.COMPLETED);
            if (turnover == null)turnover=0.0;
            turnoverList.add(turnover);
        }

        return TurnoverReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .turnoverList(StringUtils.join(turnoverList, ","))
                .build();
    }

    @Override
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }

//        新增 用户
        List<Integer> newUserList = new ArrayList<>();
//        总 用户
        List<Integer> totalUserList = new ArrayList<>();

        for (LocalDate date : dateList){
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            Map map=new HashMap();
            map.put("endTime", endTime);
            Integer totalUser = userMapper.countByMap(map);
            totalUserList.add(totalUser);

            map.put("beginTime", beginTime);
            Integer newUser = userMapper.countByMap(map);
            newUserList.add(newUser);
        }
        return UserReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .newUserList(StringUtils.join(newUserList, ","))
                .totalUserList(StringUtils.join(totalUserList, ","))
                .build();
    }

    @Override
    public OrderReportVO getOrderStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }

//        查询有效订单数和订单总数
        List<Integer> validOrderCountList = new ArrayList<>();
        List<Integer> orderCountList = new ArrayList<>();
        dateList.forEach(date -> {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            Integer orderCount = getOrderCount(beginTime, endTime, null);
            Integer validOrderCount = getOrderCount(beginTime, endTime, Orders.COMPLETED);

            orderCountList.add(orderCount);
            validOrderCountList.add(validOrderCount);
        });

//      计算总订单数
        Integer totalOrderCount = orderCountList.stream().reduce(Integer::sum).orElse(0);
//      计算有效订单数
        Integer validOrderCount = validOrderCountList.stream().reduce(Integer::sum).orElse(0);
//      计算订单完成率
        Double orderCompletionRate = 0.0;
        if (totalOrderCount != 0) {
            orderCompletionRate = validOrderCount.doubleValue() / totalOrderCount;
        }
        return OrderReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .validOrderCountList(StringUtils.join(validOrderCountList, ","))
                .orderCountList(StringUtils.join(orderCountList, ","))
                .validOrderCount(validOrderCount)
                .totalOrderCount(totalOrderCount)
                .orderCompletionRate(orderCompletionRate)
                .build();
    }

    @Override
    public SalesTop10ReportVO getSalesTop10Statistics(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);

        List<GoodsSalesDTO> salesTop10 = orderMapper.getSalesTop10(beginTime, endTime);

        List<String> nameList = new ArrayList<>();
        List<Integer> numberList = new ArrayList<>();

        List<String> names = salesTop10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        List<Integer> numbers = salesTop10.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        return SalesTop10ReportVO.builder()
                .nameList(StringUtils.join(names, ","))
                .numberList(StringUtils.join(numbers, ","))
                .build();
    }

    private Integer getOrderCount(LocalDateTime begin, LocalDateTime end, Integer status){
        Map map = new HashMap();
        map.put("beginTime", begin);
        map.put("endTime", end);
        map.put("status", status);

        return orderMapper.countByMap(map);
    }

    @Override
    public void export(HttpServletResponse httpServletResponse) throws IOException {
//查询数据
        LocalDate begin = LocalDate.now().minusDays(30);
        LocalDate end = LocalDate.now().minusDays(1);

        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);
        BusinessDataVO data = workspaceService.getBusinessData(beginTime, endTime);

//        写入
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");

        XSSFWorkbook workbook = new XSSFWorkbook(in);
        XSSFSheet sheet = workbook.getSheet("Sheet1");
        sheet.getRow(1).getCell(1).setCellValue("时间：" + begin + "至" + end);

//        填写概览数据
        sheet.getRow(3).getCell(2).setCellValue(data.getTurnover());
        sheet.getRow(3).getCell(4).setCellValue(data.getOrderCompletionRate());
        sheet.getRow(3).getCell(6).setCellValue(data.getNewUsers());
        sheet.getRow(4).getCell(2).setCellValue(data.getValidOrderCount());
        sheet.getRow(4).getCell(4).setCellValue(data.getUnitPrice());

//        填写明细数据
        for (int i = 0; i < 30; i++) {
            LocalDate date = begin.plusDays(i);
            BusinessDataVO day = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));

            sheet.getRow(7 + i).getCell(1).setCellValue(date.toString());
            sheet.getRow(7 + i).getCell(2).setCellValue(day.getTurnover());
            sheet.getRow(7 + i).getCell(3).setCellValue(day.getValidOrderCount());
            sheet.getRow(7 + i).getCell(4).setCellValue(day.getOrderCompletionRate());
            sheet.getRow(7 + i).getCell(5).setCellValue(day.getUnitPrice());
            sheet.getRow(7 + i).getCell(6).setCellValue(day.getNewUsers());
        }

//        通过输入流创建excel文件，下载到客户端
        ServletOutputStream out = httpServletResponse.getOutputStream();
        workbook.write(out);

        workbook.close();
        out.close();
        in.close();
    }
}
